Ventilator



March 19, 1940. M. E. MARsALls VENTILATOR Filed June 30, 1938 VENTOR.

fini/! ATTORNEY.

Patented Mar. 19, 1940 UNITED vs'rnrr-s PATENT oFFicE VENTILATon MartinE. Marsalis, Fort Worth, Tex. Application June 3o, 193s, serial No.216,655

1 Claim.

This invention relates to ventilators for chimney, sinoliestacks, or forany purpose to which it may be applied.

Thev invention provides improvements inventilators and has for itsprimary object the provision of a general purpose ventilator of simpleconstruction and which is so made and operable as to permit a draftthrough the chimney, flue or other means to which it may be applied andprevent down drafts of air.

Another object of the invention is to vprovide a ventilator which willbe eifective in operation in calm weather as when the wind or air iscomparatively still.

Another object of the improved ventilator is that it provides a dampermeans for closing the ventilator opening when required.

The above objects of the ventilator will become apparent from thefollowing detailed description, taken in connection with theaccompanying drawing, and inthe drawing:

Figure 1 is a side elevational view of the improved ventilator, the viewbeing partly in section and partly shown inbreken lines.;

Figure 2 is an enlarged detail vertical sectional view of the upper partof the stationary portion of the ventilator; and i Figure 3 is across-sectionalview of Figure 1, the view being had along the line 3-3of said ligure. y

Referring in detail to the drawing and wherein the several parts of theinvention will be indicated by numerals, in Figure l is shown theventilator in operable position, the lower portion I of which may befastened or secured in any preierred manner to a chimney, smokestack 0rthe like. Welded. or riveted or secured to the portion I in anypreferred way are supports 2 and these supports hold in positionI thecover 3 of the ventilator. This cap or cover is of conical shape asshown and projects beyond the lower portion I and the assemblage of theupper and lower portions I and 3 is such as to leave a space A betweenthe lower edge and the upper edge of these two parts, for the outward owor passage of smoke, air or the like. In this arrangement andconstruction the ventilator opening is thus completely covered.

The moveable portion of the ventilator consists of a semi-circular apronor shield 4 to which is connected a vane 5, the vane being provided forthe purpose of maintaining the shield always in a wind deflectingposition to prevent downdraits from entering the ventilator opening asindicated by the arrow, Figure 1. The shield thus prevents the entrance'of wind or drafts through the opening A when the shield is in a winddeflecting position. The wind on striking the shield is directed aroundthe same and comes together or the air current thus divided thus meetsbehind the apron or shield and a partial vacuum is then present withinthe area defined by the semi-circular shape ofthe apronor shield.

For holding the vane 5 in operable position there is provided a member 6with a hollow interior and a rounded head, the vane 5 being welded, madeintegral with or otherwise con nected to the member 6. A knob orconnecting socket 8 is formed on the member l and to the latter isconnected a vrod or bar 9, the rod or bar being in turn welded orriveted to the upper edge or wall of the shield as shown. The vane andshield are thus balanced and held in proper operable position.

'Ihe vane and shield constructed as described are made to revolve on thecovering or top 3 of the vventilator by means of a rod I0, its upper endbeingrigidly seated in the member '5. The revoluble operation of thevane and shield also includes the provision of a seatfor the lower endof the rod I0, this seat being made in thev member II which is welded orfastened to the under surface of the top or cover 3 in any lsuitablemanner, or may be made an integral part thereof. In this member II,which is hollow, are placed two balls I2, and upon which the rod II) issupported.

The completion of the revoluble mounting of the shield is by means of acapo I2, riveted to the top 0r covering 3 as shown, the apex of the conethereof having a hole for the passage of the rod I0. The cap extendsupwardly to form a -tubular projection or neck I3 and in which the rodI0 also rotates. y

For the purpose of preventing violent or sudden gusts of win-d fromdislodging the vane and shield assembly, the tubular projection I3 isformed with an lannular recess or channel I 4. In the skirt I5, formingthe lower end of the member 6, is carried a set screw I6, the inner endof this screw' adapted to ride around in the annular recess with theturning of the shield andvane, and this arrangement effectively preventsdislodgement of the Vane and shield assembly.

The ventilator also includes a damper arrangement for shutting off orclosing the ventilator opening. This damper, indicated at I8, is madewith spaced peripheral notches I9 and is adapted to be slid upwardly anddownwardly on the supports 2, the notches embracing the latter. A pulley2I, carried on the lower end of the member Il, and over which a chain 22rides, is connected to the damper. The damper is thus elevated to anopen position of the ventilator by a pull on the chain and the damper isheld in an open position by a catch 24, having a notch in which thechain is caught, such as shown in Figure 2.

It is believed that the foregoing description is sufcient to explain theoperation of the ventilator and that no further explanation will benecessary. It is to be understood, however, that modicaticns andalterations are possible apart from the structure shown, and such as maybe said to come fairly Within the scope and meaning of the appendedclaim.

What is claimed as new is:

A ventilator comprising a -base member, a

shield, a vane, and a top member, the said top,

member being spaced from and connected to the base member to provide alateral opening and having its peripheral outer edge extending beyondthe top edge of the base member, said shield and vane being connectedtogether and a cap member being secured to the said vane, means forpivotally and swingably mounting the cap member of the shield and vaneon the top member, the cap member having an apron portion carrying a setscrew, the means for swingably mounting the cap member of the vane andshield on the top member comprising a cone member having an aperture inits top portion and being secured to said top member, a bearing withball members secured to the said cone member and a rod extendingupwardly from the balls in the bearing member through the aperture inthe cone member and reaching into the cap member, the cone member havingan annular recess for the reception of the set screw carried in theapron portion of the cap member for locking the said vane and shieldassembly in a rotatable position against accidental dislodgement.

MARTIN E. MARSALIS.

